RE: .270 VS. .30-06
It's a toss up. I own both and they both shoot practically the same. The .270 is better at longer distances but no so much better that I could not kill at the same distance with the .30-06 . Either caliber you choose, I think you will be happy with.
Personally I would go with the .30-06 this year and then next year buy the .270 . Buy both of them! You can't go wrong with either one.